Video encoding method using inter-view prediction and device thereof, and video decoding method and device thereof

Abstract

An inter-view video decoding method may include determining a disparity vector of a current second-view depth block by using a specific sample value selected within a sample value range determined based on a preset bit-depth, detecting a first-view depth block corresponding to the current second-view depth block by using the disparity vector, and reconstructing the current second-view depth block by generating a prediction block of the current second-view depth block based on coding information of the first-view depth block.

The invention claimed is: 
     
       1. An inter-view video decoding method comprising:
 determining a disparity vector of a current second-view depth block in a slice unit by using a camera parameter in the slice unit included a bitstream and a specific sample value selected within a sample value range determined based on a preset bit-depth; 
 detecting a first-view depth block corresponding to the current second-view depth block by using the disparity vector; and 
 reconstructing the current second-view depth block by generating a prediction block of the current second-view depth block based on coding information of the first-view depth block. 
 
     
     
       2. The inter-view video decoding method of  claim 1 , wherein the selected specific sample value is a median value among values comprised in the sample value range. 
     
     
       3. The inter-view video decoding method of  claim 1 , wherein the reconstructing of the current second-view depth block comprises:
 obtaining motion information of the current second-view depth block by using motion information of the first-view depth block; and 
 reconstructing the current second-view depth block by performing motion compensation by using the motion information of the current second-view depth block. 
 
     
     
       4. An inter-view video decoding apparatus comprising:
 a disparity vector determiner for determining a disparity vector of a current second-view depth block in a slice unit by using a camera parameter in a slice unit included in a bitstream and a specific sample value selected within a sample value range determined based on a preset bit-depth; and 
 an inter-view compensator for detecting a first-view depth block corresponding to the current second-view depth block by using the determined disparity vector, and reconstructing the current second-view depth block by generating a prediction block of the current second-view depth block based on coding information of the first-view depth block. 
 
     
     
       5. The inter-view video decoding apparatus of  claim 4 , wherein the selected specific sample value is a median value among values comprised in the sample value range. 
     
     
       6. The inter-view video decoding apparatus of  claim 4 , wherein the inter-view compensator obtains motion information of the current second-view depth block by using motion information of the first-view depth block, and reconstructs the current second-view depth block by performing motion compensation by using the motion information of the current second-view depth block. 
     
     
       7. An inter-view video encoding method comprising:
 determining a disparity vector of a current second-view depth block by using a camera parameter to be included in a slice unit and a specific sample value selected within a sample value range determined based on a preset bit-depth; 
 detecting a first-view depth block corresponding to the current second-view depth block by using the determined disparity vector; and 
 encoding the camera parameter in a slice unit included in a bitstream and encoding the current second-view depth block by generating a prediction block of the current second-view depth block based on coding information of the first-view depth block. 
 
     
     
       8. The inter-view video encoding method of  claim 7 , wherein the selected specific sample value is a median value among values comprised in the sample value range. 
     
     
       9. The inter-view video encoding method of  claim 7 , wherein the encoding of the current second-view depth block comprises:
 obtaining motion information of the current second-view depth block by using motion information of the first-view depth block; and 
 encoding the current second-view depth block by performing motion prediction by using the motion information of the current second-view depth block. 
 
     
     
       10. A non-transitory computer-readable recording medium having recorded thereon a computer program for implementing the inter-view video decoding method of  claim 1 . 
     
     
       11. A non-transitory computer-readable recording medium having recorded thereon a computer program for implementing the inter-view video encoding method of  claim 7 .